Herman W. Sheffer has written:

'Copper leaching practices in the Western United States' -- subject(s): Copper, Leaching, Metallurgy

P. Bhakta has written:

'Alkaline oxidative leaching of gold-bearing arsenopyrite ores' -- subject(s): Gold, Leaching, Metallurgy, Oxidation, Sodium hydroxide

Rong-yu Wan has written:

'Accelerated ferric sulfate leaching of copper from CuFeS2/C aggregates' -- subject(s): Metallurgy, Copper, Chalcopyrite, Leaching

Illuvation

or leaching

Leaching is a widely used extractive metallurgy technique which converts metals into soluble salts in aqueous media. Compared to pyrometallurgical operations, leaching is easier to perform and much less harmful, because no gaseous pollution occurs. The only drawback of leaching is its lower efficiency caused by the low temperatures of the operation, which dramatically affect chemical reaction rates.

Calcification is the process in which the mineral calcium builds up in soft tissue, causing it to harden. Calcifications may be classified on whether there is mineral balance or not, and the location of thecalcification.